O/C Question

I have a VIA KT600 Chipset w/Sempron 2500+ and it was set at 1.7. But in the bios it says it can overcloak to 2.2 and i was wondering how i could make this possible. I never overclocked a cpu before and i would like to know how to do this. I searched for hours on the web looking through forums but no one hasnt talked about my setting situation.

I have a VIA KT600 Chipset w/Sempron 2500+ and it was set at 1.7. But in the bios it says it can overcloak to 2.2 and i was wondering how i could make this possible. I never overclocked a cpu before and i would like to know how to do this. I searched for hours on the web looking through forums but no one hasnt talked about my setting situation.